Long story short. I have moved house with DS. His father has had No contact with him in months even after living close by. We had a regular private arrangement for child maintinence to go into the back which has been going fine for 12 months. As a result of him finding out we moved the maintinence didn't go into my bank on Friday. I contacted CMS today and they advised I contact him to negotiate. I did this and he is now saying he phoned them and as he isn't on the birth certificate he has got advice and said he is under no legal obligation to pay for DS . He also said if I go through CMS they will need a dna test. I know this is true about no legal obligation if not on the birth certificate but I'm surprised he is going to the lengths of wanting DNA. My guess is it's just to prolong the situation. Where should I go from here? He knows full well he is the dad and has paid for 1 year he is now being spiteful and taking things out on DS.